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1da177e4 LT |
1 | #ifndef __ASM_SH_THREAD_INFO_H |
2 | #define __ASM_SH_THREAD_INFO_H | |
3 | ||
4 | /* SuperH version | |
5 | * Copyright (C) 2002 Niibe Yutaka | |
6 | * | |
7 | * The copyright of original i386 version is: | |
8 | * | |
9 | * Copyright (C) 2002 David Howells (dhowells@redhat.com) | |
10 | * - Incorporating suggestions made by Linus Torvalds and Dave Miller | |
11 | */ | |
1da177e4 | 12 | #ifdef __KERNEL__ |
a6a31139 | 13 | #include <asm/page.h> |
1da177e4 LT |
14 | |
15 | #ifndef __ASSEMBLY__ | |
16 | #include <asm/processor.h> | |
17 | ||
18 | struct thread_info { | |
19 | struct task_struct *task; /* main task structure */ | |
20 | struct exec_domain *exec_domain; /* execution domain */ | |
6ecf66ae | 21 | unsigned long flags; /* low level flags */ |
1da177e4 | 22 | __u32 cpu; |
dcd497f9 | 23 | int preempt_count; /* 0 => preemptable, <0 => BUG */ |
2991be72 | 24 | mm_segment_t addr_limit; /* thread address space */ |
1da177e4 | 25 | struct restart_block restart_block; |
a6a31139 PM |
26 | unsigned long previous_sp; /* sp of previous stack in case |
27 | of nested IRQ stacks */ | |
1da177e4 LT |
28 | __u8 supervisor_stack[0]; |
29 | }; | |
30 | ||
31 | #endif | |
32 | ||
37053cc8 | 33 | #define PREEMPT_ACTIVE 0x10000000 |
a6a31139 | 34 | |
7a847f81 PM |
35 | #if defined(CONFIG_4KSTACKS) |
36 | #define THREAD_SIZE_ORDER (0) | |
37 | #elif defined(CONFIG_PAGE_SIZE_4KB) | |
38 | #define THREAD_SIZE_ORDER (1) | |
39 | #elif defined(CONFIG_PAGE_SIZE_8KB) | |
40 | #define THREAD_SIZE_ORDER (1) | |
41 | #elif defined(CONFIG_PAGE_SIZE_64KB) | |
42 | #define THREAD_SIZE_ORDER (0) | |
a6a31139 | 43 | #else |
7a847f81 | 44 | #error "Unknown thread size" |
a6a31139 | 45 | #endif |
7a847f81 PM |
46 | |
47 | #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) | |
48 | #define STACK_WARN (THREAD_SIZE >> 3) | |
1da177e4 LT |
49 | |
50 | /* | |
51 | * macros/functions for gaining access to the thread information structure | |
52 | */ | |
53 | #ifndef __ASSEMBLY__ | |
54 | #define INIT_THREAD_INFO(tsk) \ | |
55 | { \ | |
56 | .task = &tsk, \ | |
57 | .exec_domain = &default_exec_domain, \ | |
58 | .flags = 0, \ | |
59 | .cpu = 0, \ | |
60 | .preempt_count = 1, \ | |
2991be72 | 61 | .addr_limit = KERNEL_DS, \ |
1da177e4 LT |
62 | .restart_block = { \ |
63 | .fn = do_no_restart_syscall, \ | |
64 | }, \ | |
65 | } | |
66 | ||
67 | #define init_thread_info (init_thread_union.thread_info) | |
68 | #define init_stack (init_thread_union.stack) | |
69 | ||
a6a31139 | 70 | /* how to get the current stack pointer from C */ |
3ff6eecc | 71 | register unsigned long current_stack_pointer asm("r15") __used; |
a6a31139 | 72 | |
1da177e4 LT |
73 | /* how to get the thread information struct from C */ |
74 | static inline struct thread_info *current_thread_info(void) | |
75 | { | |
76 | struct thread_info *ti; | |
114f1329 PM |
77 | #if defined(CONFIG_SUPERH64) |
78 | __asm__ __volatile__ ("getcon cr17, %0" : "=r" (ti)); | |
79 | #elif defined(CONFIG_CPU_HAS_SR_RB) | |
80 | __asm__ __volatile__ ("stc r7_bank, %0" : "=r" (ti)); | |
f1517494 PM |
81 | #else |
82 | unsigned long __dummy; | |
83 | ||
84 | __asm__ __volatile__ ( | |
85 | "mov r15, %0\n\t" | |
86 | "and %1, %0\n\t" | |
87 | : "=&r" (ti), "=r" (__dummy) | |
88 | : "1" (~(THREAD_SIZE - 1)) | |
89 | : "memory"); | |
90 | #endif | |
91 | ||
1da177e4 LT |
92 | return ti; |
93 | } | |
94 | ||
95 | /* thread information allocation */ | |
d153ea88 PM |
96 | #ifdef CONFIG_DEBUG_STACK_USAGE |
97 | #define alloc_thread_info(ti) kzalloc(THREAD_SIZE, GFP_KERNEL) | |
98 | #else | |
99 | #define alloc_thread_info(ti) kmalloc(THREAD_SIZE, GFP_KERNEL) | |
100 | #endif | |
101 | #define free_thread_info(ti) kfree(ti) | |
1da177e4 | 102 | |
510c72ad | 103 | #endif /* __ASSEMBLY__ */ |
1da177e4 LT |
104 | |
105 | /* | |
106 | * thread information flags | |
107 | * - these are process state flags that various assembly files may need to access | |
108 | * - pending work-to-be-done flags are in LSW | |
109 | * - other flags in MSW | |
110 | */ | |
111 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | |
a583f1b5 SE |
112 | #define TIF_SIGPENDING 1 /* signal pending */ |
113 | #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ | |
114 | #define TIF_RESTORE_SIGMASK 3 /* restore signal mask in do_signal() */ | |
115 | #define TIF_SINGLESTEP 4 /* singlestepping active */ | |
1322b9de | 116 | #define TIF_SYSCALL_AUDIT 5 |
1da177e4 LT |
117 | #define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */ |
118 | #define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */ | |
119 | #define TIF_MEMDIE 18 | |
8a102eed | 120 | #define TIF_FREEZE 19 |
1da177e4 LT |
121 | |
122 | #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) | |
1da177e4 LT |
123 | #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) |
124 | #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) | |
9f23e7e9 | 125 | #define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK) |
9432f968 | 126 | #define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP) |
1322b9de | 127 | #define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT) |
1da177e4 LT |
128 | #define _TIF_USEDFPU (1<<TIF_USEDFPU) |
129 | #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) | |
8a102eed | 130 | #define _TIF_FREEZE (1<<TIF_FREEZE) |
1da177e4 LT |
131 | |
132 | #define _TIF_WORK_MASK 0x000000FE /* work to do on interrupt/exception return */ | |
133 | #define _TIF_ALLWORK_MASK 0x000000FF /* work to do on any return to u-space */ | |
134 | ||
135 | #endif /* __KERNEL__ */ | |
136 | ||
137 | #endif /* __ASM_SH_THREAD_INFO_H */ |